# TachyMon vs Sippy

The clearest difference is in-app purchases: Sippy at none against TachyMon's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. TachyMon sells 2 in-app purchases, starting at $2.99 per month. Sippy asks for nothing beyond the download.

TachyMon ships an update every 3 months, Sippy every 2 months. The most recent releases landed on October 21, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | TachyMon | Sippy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (287 ratings)](https://appshunter.io/ios/app/tachymon/id1603517412/reviews)** | — |
| Number of ratings | **287** | — |
| Positive reviews | 57.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 36 MB | 2 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Age rating | 9+ | 4+ |
| Developer | [Whip Development Inc.](https://appshunter.io/developer/1603514887) | [XL Concepts](https://appshunter.io/developer/1896609677) |

## What reviewers say

### TachyMon

[App page](https://appshunter.io/ios/app/tachymon/id1603517412)

Receive immediate alerts for significant heart rate fluctuations, ideal for conditions like POTS or during exercise. Customize thresholds and receive detailed event tracking. Premium features offer advanced data visualization and reporting.

**Highlights:** Customizable heart rate threshold alerts, Haptic feedback for alerts, Real-time heart rate and average display, Alert event tracking and logging, Temporary alert silencing, Detailed monitoring data review, Shareable PDF reports (premium)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TachyMon Premium Monthly | $2.99 | per month |
| TachyMon Premium Annual | $19.99 | per year |

**What reviewers like**

- 🚀 Continuous monitoring
- 🚨 Helpful alerts for heart rate spikes/drops
- 📊 Useful data tracking and visualization
- 🤖 Customizable settings and thresholds
- 💯 Accurate heart rate measurements

**What reviewers complain about**

- 🔋 Drains Apple Watch battery quickly
- 🔒 Paywalled features that were previously free
- 🤯 Buggy and unreliable at times
- 📱 Lack of companion iPhone app for data review
- 🔇 Limited notification/alert customization

**Reported bugs**

- Frequent disconnections from heart rate monitor
- Inconsistent data sync between watch and phone
- Inability to reinstall app on new devices
- Freezing and crashing issues on latest updates

**Requested features**

- Add ability to log symptoms and notes
- Implement emergency contact alerts
- Improve data export and sharing options
- Enhance graphing and trend analysis tools
- Optimize battery usage and background monitoring


### Sippy

[App page](https://appshunter.io/ios/app/sippy-hydration-tracker/id6792977989)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is TachyMon free?

TachyMon is free to download, with in-app purchases available.

### Is Sippy free?

Sippy is free to download, with no in-app purchases.

### Do TachyMon or Sippy have ads?

Neither TachyMon nor Sippy shows ads.

### Which is updated more often, TachyMon or Sippy?

TachyMon ships an update every 3 months, and Sippy every 2 months. Most recently, TachyMon was updated on October 21, 2026 and Sippy on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*